module dispatch_uncond(
    input [27:0] instr,
    output is_cps,
    output undefined
);
reg [1:0] iclass;
assign undefined = iclass[0];
assign is_cps = iclass[1];
always @* begin
    casez (instr)
        28'b00010000???00000000???0?????: iclass = 1<<1;
        default: iclass = 1;
    endcase
end
endmodule
